for this you would isolate the variable, x. hence x-7=2 +7=+7 ----------- x=9
Round 3.864 to the nearest tenth.
the tenths place falls to the right of the decimal sign. In this case, the 8 would be to the tenths. when rounding, we look at the number one place to the right to the tenths (6) and if the number is 4 or less then we round down, if its 5 or more we round up. the number next to the tenth is 6 so we would round the 8 up by 1 and make it a 9. the answer would come to 3.9
Evaluate: 30 - 12÷3×2 =
Here we would use the method of PEMDAS: parenthesis, exponents, multiplication and division (in the order it appears), addition and subtraction (in the order it appears). We see a subtraction then division and then multiplication. but we would solve the division first, multiplication second, and subtraction last. Division: 30-4x2= multiplication: 30-8= subtraction: 22